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93 lines
3.2 KiB
Python
Executable File
93 lines
3.2 KiB
Python
Executable File
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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__init__.py
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---------------------
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Date : January 2007
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Copyright : (C) 2007 by Martin Dobias
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Email : wonder dot sk at gmail dot com
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***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************
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"""
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__author__ = 'Martin Dobias'
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__date__ = 'January 2007'
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__copyright__ = '(C) 2007, Martin Dobias'
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# This will get replaced with a git SHA1 when you do a git archive
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__revision__ = '$Format:%H$'
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import sip
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try:
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apis = ["QDate", "QDateTime", "QString", "QTextStream", "QTime", "QUrl", "QVariant"]
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for api in apis:
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sip.setapi(api, 2)
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except ValueError:
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# API has already been set so we can't set it again.
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pass
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from qgis.core import QgsFeature, QgsGeometry
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try:
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# Add a __nonzero__ method onto QPyNullVariant so we can check for null values easier.
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# >>> value = QPyNullVariant("int")
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# >>> if value:
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# >>> print "Not a null value"
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from types import MethodType
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from PyQt4.QtCore import QPyNullVariant
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def __nonzero__(self):
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return False
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def __repr__(self):
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return 'NULL'
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def __eq__(self, other):
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return isinstance(other, QPyNullVariant) or other is None
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def __ne__(self, other):
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return not isinstance(other, QPyNullVariant) and other is not None
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def __hash__(self):
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return 2178309
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QPyNullVariant.__nonzero__ = MethodType(__nonzero__, None, QPyNullVariant)
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QPyNullVariant.__repr__ = MethodType(__repr__, None, QPyNullVariant)
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QPyNullVariant.__eq__ = MethodType(__eq__, None, QPyNullVariant)
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QPyNullVariant.__ne__ = MethodType(__ne__, None, QPyNullVariant)
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QPyNullVariant.__hash__ = MethodType(__hash__, None, QPyNullVariant)
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# define a dummy QPyNullVariant instance NULL in qgis.core
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# this is mainly used to compare against
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# so one can write if feat['attr'] == NULL:
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from qgis import core
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core.NULL = QPyNullVariant( int )
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except ImportError:
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pass
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def mapping_feature(feature):
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geom = feature.geometry()
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properties = {}
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fields = [field.name() for field in feature.fields()]
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properties = dict(zip(fields, feature.attributes()))
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return {'type' : 'Feature',
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'properties' : properties,
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'geometry' : geom.__geo_interface__}
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def mapping_geometry(geometry):
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geo = geometry.exportToGeoJSON()
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# We have to use eval because exportToGeoJSON() gives us
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# back a string that looks like a dictionary.
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return eval(geo)
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QgsFeature.__geo_interface__ = property(mapping_feature)
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QgsGeometry.__geo_interface__ = property(mapping_geometry)
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